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RE: [a11y] comments on the navigation requirements

From: White, Jason J <jjwhite@ets.org>
Date: Thu, 7 Sep 2017 13:23:55 +0000
To: Avneesh Singh <avneesh.sg@gmail.com>, Romain <rdeltour@gmail.com>, W3C Publishing Working Group <public-publ-wg@w3.org>
Message-ID: <BN6PR07MB3457A7254A773E2C305FECDDAB940@BN6PR07MB3457.namprd07.prod.outlook.com>
I read Romain's comments as seeking desirable and legitimate clarification of the material rather than as attempting to turn it into a precisely specified set of requirements.

> -----Original Message-----
> From: Avneesh Singh [mailto:avneesh.sg@gmail.com]
> Sent: Thursday, September 7, 2017 4:43 AM
> To: Romain <rdeltour@gmail.com>; W3C Publishing Working Group <public-
> publ-wg@w3.org>
> Subject: Re: [a11y] comments on the navigation requirements
> Hi Romain,
> Thanks for the list.
> As discussed in yesterday's call, we should not try to over specify things in this
> document because this is at the conceptual level.
> Surely clarifications will help at places, and we should do it.
> We should also add missing concepts.
> But we should not try to make it something like WCAG principles and success
> criteria.
> We should add a note regarding this at the top, so that readers are aware of it.
> With regards
> Avneesh
> -----Original Message-----
> From: Romain
> Sent: Thursday, September 7, 2017 14:01
> To: W3C Publishing Working Group
> Subject: [a11y] comments on the navigation requirements
> Hi a11y TF,
> Following yesterday's call, here are my comments on the "Description of
> Accessibility Requirements for WP" wiki document, before we share to a larger
> audience.
> The following comments were mentioned in the call, I re-state them here for
> completeness:
> - I find that "accessible to readers" and "machine readable" (used in several
> places) are a bit confusing. Especially "accessible to readers":
> does it mean accessible in a browser, or in a WP-aware reading system, or
> something else?
> My suggestion is to see if we can use instead the concept of "accessibility
> supported", which is well-defined in WCAG.
> - the sentence "The information about hierarchy of sections must be preserved
> in WP" is not very clear to me. As suggested by Matt, one requirement is that
> "WP needs to define a way to express hierarchical content in a sequence of
> documents". I also agree with George that the issue isn't just about accessibility,
> but is a larger one: what does it mean for a document to be part of a web
> publication? is there an API to see the publication as a whole? etc.
> The next comments are about the "navigation and default reading order"
> section:
> - what is meant by "navigation" in this section? does it mean "linked in the ToC"
> or can it include the other various ways to reach content in a publication (e.g.
> from list of pages, from a site map, from next/previous links, etc).
> - The first bullet says:
> > Ideally navigation to all content resources is required, but there can
> > be some flexibility in some situations.
> what are these situations ? the current wording is not very precise, so as-is it can
> (and will) be interpreted as "navigation to all content resources is not required".
> We might come up with rules like "if a document has a heading, it must be linked
> from the ToC", but it would be an a11y guideline rather than something defined
> in the spec.
> > If there is default reading order which lists all the content
> > resources then author can be given flexibility to exclude some content
> > resources from navigation.
> This requirement doesn't add much from the previous bullet, which already said
> that some content resources could be excluded. Is it meant to be a refinement
> of the first?
> Does it mean
> - "If the default reading order lists all the content resources, the ToC is
> optional"?
> - OR "If a content resource is in the default reading order, it doesn't have to be
> linked in the ToC"?
> - OR "if a content resource can be accessed in a natural reading order, if doesn't
> have to be linked in the ToC"?
> - OR something else?
> > If default reading order does not cover all content resources (e.g.
> > decision tree based traversal in publication) then access to all the
> > content resources has to be ensured with navigation.
> That's interesting: let's consider a publication with most of its content outside
> the default reading order (e.g."chose your own adventure").
> Does all the content need to be *directly* accessible from a top-level
> navigation, or is it enough to be somehow reachable from *a* natural reading
> order?
> (Note: I'm using "natural reading order" to describe a reading order that is a
> natural reading sequence, if not the default one.) There's also the author's
> intent, who might want to hide some content until some reading is done.
> Wouldn't that be in conflict with this requirement?
> > For the resources in default reading order, continuous reading
> > experience is required. In other words, the user should be able to
> > move from end of a content resource to the next resource without going
> through TOC again.
> Good. Here particularly, using "accessibility supported" may free us of the
> "browser vs. RS" debate.
> > In all the above scenarios, user agent should be able to inform users
> > about their current reading location in WP.
> This is SC 2.4.7., plain and simple. We should say if there's anything specific to
> WP here.
> Thoughts welcome!
> Romain.


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Received on Thursday, 7 September 2017 13:24:23 UTC

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